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SECTION 1: CARBURETORS/MIXERS 300A SERIES

MODEL 300A ACCESSORIES

The Model 300A carburetor is a single-diaphragm air valve carburetor / mixer. It offers a downdraft air inlet that can be used for remote air filtration or open-element type air filters. This unit is available for Propane, and Natural Gas applications. The 300A has numerous adapters to allow the installer to fit the 300A into most underhood vehicle applications. The Model 300A is also available for feedback applications with the `FB' designation. The 300A can also be equipped with a cam mechanism to allow the air valve to be raised to its full open position to minimize any restriction in the base vehicle air stream. Optional air cleaner assemblies are also available for engines which require higher CFM air flow.

TECHNICAL SPECIFICATIONS Fuel Type ......................................................CNG / Propane Maximum Fuel Inlet Pressure ..................... in H20 8.0 Air Flow Capacity (1 & 20)............................. 348 cfm @ 1.5 in Hg manifold Air Flow Capacity (50 & 70)........................... 432 cfm @ 1.5 in Hg manifold Horsepower Rating (1 & 20)......................... 217 hp @ 2,500 BTU per cubic feet Horsepower Rating (50 & 70)....................... 270 hp @ 2,500 BTU per cubic feet Operating Temperature................................. -40°C to 120°C (-40°F to 250°F) Materials Body ...................................................... Aluminum Diaphragm ............................................. Hydrin (Standard), Silicone (Optional)

© IMPCO TECHNOLOGIES, INC.

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July 2005

SECTION 1: CARBURETORS/MIXERS 300A SERIES

DIMENSIONS

A

MOUNTING SURFACE TO TOP OF FUEL INLET

B

OVERALL HEIGHT

C

D

10" AIR FILTER MICROSWITCH VACUUM VALVE AIR VALVE DIAPHRAGM (B-BLACK HYDRIN) S-SILICONE)

MIXER

MIXER ONLY AIR CLEANER NO AIR OVERALL HEIGHT FILTER WIDTH

GAS VALVE

CA300A-M CA300A-M-2 CA300A-M-3 CA300A-M-3-2 CA300A-M-4-2 CA300AM-50-2 CA300AM-50-3 CA300AM-50-4 FB300A-M-2 FB300A-M-4-2 FB300AM-50-2 FB300AM-50-4 FB300AM-50-4TP

88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5") 88.9 mm (3.5")

104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125") 104.7 mm (4.125")

206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125") 206.3 mm (8.125")

69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75") 69.8 mm (2.75")

x x x x x x x x x x x x x x x x x x x x

V2-11

B S B B S B

V2-39 V2-39 V2-49 V2-50

S S S S S B B

© IMPCO TECHNOLOGIES, INC.

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SECTION 1: CARBURETORS/MIXERS 300A SERIES

MODEL 300A 1 AND 50

ITEM #

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

PART #

S1-3 P3-2 AE1-4 NSS R1-9 S3-3 BE1-4-1 S1-15 S4-20 V2-49 V2-50 S2-3 AV2-11 AV2-39 NSS NSS NSS G1-1 NSS NSS NSS AC1-2 AC1-2-3 S2-2 S1-12 P2-1 D1-1-1 D1-1-2 G1-15 R1-2 NSS NSS AV1-10-1 AV1-10-2 NSS S1-5 NSS NSS NSS NSS NSS S1-69 AC2-2

DESCRIPTION

Screw, 10-24 x 5/8" SEMS (3) Plug, idle adjustment Elbow with power adjustment: E1-4, V2-9, W1-12 * Gasket, gas elbow * Ring, seal retainer * Seal, idle screw Elbow ass'y, complete: P3-2, AE1-4, R1-9, S3-3 Screw, idle adjustment Seat, gas valve (CA300A-50 only) Valve Gas Mixer FB300A Valve Gas Mixer FB300A Spring, gas valve Gas valve ass'y, complete Gas valve ass'y, complete Screw 10-24 x 1" (3) Nut, dome 10-24 (3) Washer, No.10 light flat (6) * Gasket, filter cover Rivet, vent valve Valve cover vent Cover, diaphragm (CA300A only) Cover assy., diaphragm with vent valve Cover assy., diaphragm with vent valve Spring, air valve Screw, 8-32 x 5/16" SEMS (6) Plate, diaphragm backup * Diaphragm, air valve * Diaphragm, air valve, silicone * Gasket, air valve Ring, air valve Valve, air metering: V1-10, L1-3, B3-24 * Lock, nylon idle adjustment Air valve ass'y, complete with diaphragm Air valve ass'y, complete with diaphragm Ring, diaphragm support (CA300A only) Screw, 1/4"-20 x 5/8" hex head SEMS (3) Screw, 10-24 x 1-1/2" SEMS (3) Clamp, Boden wire Screw, 10-32 x 5/8" hex head Base ass'y, complete Nut, square, 1/4"-20 Screw, 1/4"x 5/16" (plug) Cam ass'y: C2-2, W1-2, S1-7

NSS = NOT SERVICED SEPARATELY

* Indicates components of minor repair kit. Indicates components of major repair kit.

© IMPCO TECHNOLOGIES, INC.

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SECTION 1: CARBURETORS/MIXERS 300A SERIES

MODEL 300A SERIES 20 AND 70

ITEM #

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

PART #

S1-3 P3-2 AE1-4 NSS R1-9 S3-3 BE1-4-1 S1-15 S4-20 V2-49 V2-50 S2-3 AV2-11 AV2-39 NSS NSS NSS G1-1 NSS NSS NSS AC1-2 S2-2 S1-12 P2-1 D1-1-1 D1-1-2 G1-15 R1-2 NSS NSS AV1-10-1 AV1-10-2 NSS S1-5 NSS NSS NSS NSS NSS S1-69 AC2-2 NSS NSS NSS NSS NSS NSS NSS

DESCRIPTION

Screw, 10-24 x 5/8" SEMS (3) Plug, idle adjustment Elbow with power adjustment * Gasket, gas elbow * Ring, seal retainer * Seal, idle screw Elbow ass'y, complete: P3-2, AE1-4, R1-9, S3-3 Screw, idle adjustment Seat, gas valve (CA300A-50 only) Valve, gas metering Valve, gas metering Spring, gas valve Gas valve ass'y, complete Gas valve ass'y, complete Screw 10-24 x 1" (3) Nut, dome 10-24 (3) Washer, No.10 light flat (6) * Gasket, filter cover Rivet, vent valve Valve cover vent Cover, diaphragm (CA300A only) Cover ass'y, diaphragm with vent valve Spring, air valve Screw, 8-32 x 5/16" SEMS (6) Plate, diaphragm backup * Diaphragm, air valve * Diaphragm, air valve, silicone * Gasket, air valve Ring, air valve Valve, air metering: V1-10, L1-3, B3-24 * Lock, nylon idle adjustment Air valve ass'y, complete with diaphragm Air valve ass'y, complete with diaphragm Ring, diaphragm support (CA300A only) Screw, 1/4"-20 x 5/8" hex head SEMS (3) Screw, 10-24 x 1-1/2" SEMS (3) Clamp, Boden wire Screw, 10-32 x 5/8" hex head Base ass'y, complete Nut, square, 1/4"-20 Screw, 1/4"x 5/16" (plug) Cam ass'y: C2-2, W1-2, S1-7 Body vacuum valve: B1-41, P1-20 Valve, rotary Spring, vacuum valve Cap, vacuum valve Screw, 4-40 x 3/4" (3) Connector, wire (2) Switch, gasoline

NSS = NOT SERVICED SEPARATELY

* Indicates components of minor repair kit. Indicates components of major repair kit.

© IMPCO TECHNOLOGIES, INC.

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SECTION 1: CARBURETORS/MIXERS 300A SERIES

STANDARD AND OPTIONAL EQUIPMENT MODEL 300A

PART #

A1-4 A1-3-2 A1-39 A1-50-2 A1-6 A1-63 AA1-40 AA1-50-5 AA1-64-3 A3-96 A1-16-1 A1-16-2 A1-54 A1-55 A1-56 A1-57 A1-62 A1-54 AA1-57 AA1-67

MIXERS

PART #

CA300A-M CA300A-M-2 CA300A-M-3 CA300A-M-3-2 CA300A-M-4-2 CA300AM-50-2 CA300AM-50-3 CA300AM-50-4 FB300A-M-2 FB300A-M-4-2 FB300AM-50-2 FB300AM-50-4 FB300AM-50-4 VL300AM-50-2

DESCRIPTION

Adapter, CA300A, mixer to 2-5/8" Air Horn, center stud Adapter, CA300A, mixer to 4-3/16" Air Horn, center stud, 3/8" shorter than A1-3-1 Adapter, CA300A 2 5/8" C/S High Profile Adapter, CA300A Adapter, CA300A, mixer to 3-1/16" Air Horn, center stud Adapter, CA300 Machined Adapter, CA300 2 5/8" w/ Clamp Nuts Adapter, Assy CA300/CA425 Adapter, CA300 dual outlet, Ford Adapter, CA300 Holley 4B Adapter, CA300, 5-1/8" Center Stud Adapter, CA300, 1/2" Shorter than A1-16-1 Adapter, 3-1/8" Air Horn Adapter, 2-5/8" Air Horn Adapter, 2- 5/16" Air Horn Adapter, Unidapt Machined Adapter, 5-1/8" Air Horn Adapter, Spacer ring Adapter, Ass'y Hood Adapter, Ass'y 175A to Hose

DESCRIPTION

Mixer only, w/O Filter, w/ Boden Wire Mixer only, w/O Filter w/ Boden Wire, Silicone Mixer, w/O Fitting, Filter,Cable, Mixer, Silicone, w/O cable, & Filter Fitting. Mixer w/O C2-32, AC2-2 Silicone Mixer only, w/O Filter, w/ AC2-2 Mixer only, w/O Filter, C2-32 Mixer Ass'y, w/O Cable & Cam Mixer Ass'y, w/ FB. Air Valve Feedback Mixer w/ C2-32 Mixer Ass'y Feedback, w/O Filter Mixer Ass'y, w/O Filter, & Cam Cable Mixer Ass'y FB w/O Cable & Filter, Tamp Rest. VLMixer Ass'y w/O Cam & Filter.

AIR VALVE ASSY

PART #

AV1-10 AV1-10-2 AV2-49 AV2-50

DESCRIPTION

Valve Ass'y, CA300A Valve Ass'y, CA300A, Silicone Gas Valve Ass'y, Complete Gas Valve Ass'y, Complete

CABLES

PART #

C2-32

DESCRIPTION

Cable, Boden Wire 300A Series

REPAIR KITS

PART # DESCRIPTION

Repair Kit, Major CA300A

FILTERS

PART #

F1-1 AF!-1 AF1-17-2 C1-4

RK300MA-1/20

RK300MA-1/20-2 Repair Kit, Major CA300A, Silicone

DESCRIPTION

Filter Element, CA300A, 350 CFM Air Filter Ass'y, CA300A Air Filter, 550 CFM Cover, CA300A-1

RK300MA-50/70-2 Repair Kit, Major CA300A, Silicone RK300MI-1/20 Repair Kit, Minor CA300A RK300MI-1/20-2 Repair Kit, Minor CA300A, Silicone RK300MI-50/70-2 Repair Kit, Minor CA300A, Silicone

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